Thought I'd finally make a thread about this since I'm starting to get sick of this noise that's coming from the rear case fan in my computer. The problem's existed for about 9ish months now, I made a thread back in March but never followed up on it since it wasn't really bothering me then. When I first boot up my PC after it's been of for a few hours (for instance in mornings), I get a loud noise coming from the rear fan of my case. It's quite loud and almost sounds like it's grinding. I originally thought it was my PSU until I replaced that and found the dilemma was still there. The sound would persist until I had booted and restarted the system enough times to essentially "warm it up" and then the noise would stop. Since I've now discovered what the problem is, I usually poke something into the small holes at the back of the case which stops the noise. Could I just buy a new fan and replace it? I've never done it before... would it mean taking the whole PC apart?